Error Code: F33 Difficulty: Hard
Problem: Excess foam has been detected in the drum.
How to Fix F33 Error (Step-by-Step)
- Disconnect the washer from power and water. Unplug the power cord from the wall outlet and turn off both the hot and cold water supply valves.
- Remove the top panel of the washer. You will typically find two screws at the back of the machine holding the top panel in place. Remove these screws and slide the top panel backward to lift it off.
- Locate the water level pressure switch. It is a small, round part usually mounted near the top of the washer cabinet, with a thin rubber tube and an electrical connector attached to it.
- Disconnect the old switch. Carefully pull the rubber tube off the nipple on the switch. Then, press the locking tab on the electrical connector to unplug it from the switch.
- Remove the old switch from its mounting bracket. It may be held by a screw or simply clip into place. Unfasten it and remove it from the washer.
- Install the new water level pressure switch. Secure the new switch onto the mounting bracket, reconnect the electrical connector until it clicks, and firmly push the rubber tube back onto the nipple.
- Reassemble the washer. Slide the top panel back into position and secure it with the screws at the back. Reconnect the water supply hoses and plug the washer back into the power outlet.
- Turn the appliance off, wait about 2 minutes, then turn it back on.
Likely Parts to Check
No exact official OEM part number is listed here because the correct Bosch Washer part can vary by full model number. These are targeted part-category searches, not universal fit claims.
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Washer electronic control boardCommon replacement category: Main control boardFit note: Exact OEM part number varies by model. Confirm compatibility using the full model number before buying.Confidence: Medium
This category can be relevant for control and communication faults after wiring checks. Inspect wiring, connectors, airflow, water path, or filters first as applicable. -
Washer user interface control panelCommon replacement category: User interface / display boardFit note: Exact OEM part number varies by model. Confirm compatibility using the full model number before buying.Confidence: Medium
This category can be relevant for display, button, selector, or cycle-control faults. Inspect wiring, connectors, airflow, water path, or filters first as applicable. -
Washer drain pump assemblyCommon replacement category: Drain pumpFit note: Exact OEM part number varies by model. Confirm compatibility using the full model number before buying.Confidence: Medium
This category can be relevant for drain, no-spin, and water-removal symptoms after filter checks. Inspect wiring, connectors, airflow, water path, or filters first as applicable.
Before ordering: match the part to the complete model number on the appliance tag.
Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
More options (for a better recommendation)
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When It’s Better to Replace Than Repair
Sometimes replacing an appliance makes more financial sense than putting more money into repairs.
Here are a few signs it may be time to shop for a new one:
For repair parts, verify exact fit with the full washer model number before buying; these links are general replacement-appliance shopping options.
- ✓Appliance over 8-10 years old
- ✓Repair cost over 50% of replacement
- ✓Multiple recent breakdowns
- ✓Major component failure
Recommended Replacement Options
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Expert: Mike Sullivan
EPA Section 608 Certified Technician with 18+ years experience.
Read Editorial Standards →Browse all Bosch error codes: Bosch Error Codes
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